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Chris Pratt and Katherine Schwarzenegger Are All Smiles During Trip to Napa Winery

Chris Pratt and Katherine Schwarzenegger had a weekend filled with sunshine and wine.

The new couple were all smiles at the Round Pond Estate winery in Napa, California on Saturday, where they sipped on the local vino with friends—including Pratt’s brother, Cully—and posed together for a series of photos.

“What a weekend! We had the distinct pleasure of hosting Mr. Chris Pratt and Miss Katherine Schwarzenegger and friends this past Saturday,” the winery wrote on Instagram, adding that the two were “every bit as warm and hilarious as you’d think!”

Cully posted his own photos from the “day-cation,” writing: “So thankful for time shared with my family & friends!”

On Sunday night, they all attended the Benefiting the Leaven Mayors Gala, also in Napa, where Pratt served as the auctioneer.

Though the pair, who met through Schwarzenegger’s mother Maria Shriver (her father is actor Arnold), have only been together since June, things have reportedly been heating up quickly. “They’re both serious about the relationship and hopeful for the future,” a source close to the couple recently told PEOPLE. “Chris doesn’t just date to date, and neither does Katherine. She’s very excited.”